| Summary: | 碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 105 === The research objective was to develop the processing of asphalt-based lead zirconate titanate composite and assess the piezoelectric properties. The pilot study was initiated to produce the composite specimens of ten percent of AC-20 binder with ninty percent of PZT by volume. The processing requires compressing the asphalt-based composite with 80MPa and 8 minutes by a MTS device and the polarization procedures involve utilizing poling votage of 2.5 kV/mm to trigger the piezoelectric properties under conditioning temperatures of 10, 20, 30, 40, and 50-°C. The polarization time was set to 5, 10, 20, 40, 60-minutes. Piezoelectric properties including piezoelectric strain constants (d33) and electromechanical coupling factors (κt) were investigated. For 100% PZT specimens, results of piezoelectric strain constants stayed about 400 pC/N after 20 minutes of polarization time and under 20 to 50-°C. A rather clear pattern can be found on impedance and phase angle diagram under the frequency of 200 to 450 kHz. The electromechanical coupling factors were about 64.9 to 70.7-% under 20 to 50-°C, respectively. For asphalt-based PZT composite, results of piezoelectric strain constants were 50 and 55 after 20 minutes of polarization time and under 40 and 50-°C. The electromechanical coupling factors were about 24.4 to 28.6-% under 40 and 50-°C, respectively. It has to be noted that the polarization process cannot be completed for 100% PZT under 10°C, and asphalt-based PZT composte under 10 to 30 °C in this study.
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